consumer模块完成度95%，检查消费者前端bug并修复

pages/mall/consumer/product-reviews.uvue

@@ -78,7 +78,7 @@
         <view class="review-header">
           <image 
             class="user-avatar" 
-            :src="review.user_avatar || defaultAvatar" 
+            :src="review.user_avatar.length > 0 ? review.user_avatar : defaultAvatar" 
             mode="aspectFill"
           />
           <view class="user-info">
@@ -109,7 +109,7 @@
             @click="previewImage(review.images, idx)"
           />
           <view class="more-images" v-if="review.images.length > 3">
-            <text>+{{ review.images.length - 3 }}</text>
+            <text class="more-images-text">+{{ review.images.length - 3 }}</text>
           </view>
         </view>
 
@@ -131,7 +131,7 @@
             @click="toggleLike(review)"
           >
             <text class="like-icon">{{ review.is_liked ? '❤' : '♡' }}</text>
-            <text class="like-count">{{ review.like_count || 0 }}</text>
+            <text class="like-count">{{ review.like_count != null ? review.like_count : 0 }}</text>
           </view>
         </view>
       </view>
@@ -620,7 +620,7 @@ onMounted(() => {
   justify-content: center;
 }
 
-.more-images text {
+.more-images-text {
   font-size: 14px;
   color: white;
 }